avcodec/omx: Zero packet padding

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/omx.c

@@ -871,6 +871,7 @@ static int omx_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
             memcpy(s->output_buf + s->output_buf_size, buffer->pBuffer + buffer->nOffset, buffer->nFilledLen);
             s->output_buf_size += buffer->nFilledLen;
             if (buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) {
+                memset(s->output_buf + s->output_buf_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
                 if ((ret = av_packet_from_data(pkt, s->output_buf, s->output_buf_size)) < 0) {
                     av_freep(&s->output_buf);
                     s->output_buf_size = 0;